John the Apostle
John 8:52BSB·traditional attribution

“Now we know that You have a demon!” declared the Jews. “Abraham died, and so did the prophets, yet You say that anyone who keeps Your word will never taste death.

John Calvin Reformed @genevareformer

52. Now we know. The reprobate persist in their stupidity, and are not moved by promises any more than by threatenings; so that they can neither be led nor drawn to Christ. Some think that they slanderously torture his words, by using the expression, taste of death, which Christ had not used; but this appears to me to be groundless.

Matthew Henry Presbyterian @wholebiblehenry

In these verses we have, I. The doctrine of the immortality of believers laid down, Joh 8:51. It is ushered in with the usual solemn preface, Verily, verily, I say unto you, which commands both attention and assent, and this is what he says, If a man keep my sayings, he shall never see death. Here we have, 1.

Commenting on John 8:51-59

John Gill Reformed Baptist @doctorgill

Yet ye have not known him,.... Not as the Father of Christ, nor as in Christ, whom to know is life eternal: they had no spiritual knowledge of him, nor communion with him; nor did they know truly his mind and will, nor how to worship and serve him as they ought: but I know him; his nature and perfections, being of the same nature...